1/* 2 * linux/include/linux/console.h 3 * 4 * Copyright (C) 1993 Hamish Macdonald 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file COPYING in the main directory of this archive 8 * for more details. 9 * 10 * Changed: 11 * 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX 12 */ 13 14#ifndef _LINUX_CONSOLE_H_ 15#define _LINUX_CONSOLE_H_ 1 16 17#include <linux/types.h> 18 19struct vc_data; 20struct console_font_op; 21struct console_font; 22struct module; 23struct tty_struct; 24 25/* 26 * this is what the terminal answers to a ESC-Z or csi0c query. 27 */ 28#define VT100ID "\033[?1;2c" 29#define VT102ID "\033[?6c" 30 31struct consw { 32 struct module *owner; 33 const char *(*con_startup)(void); 34 void (*con_init)(struct vc_data *, int); 35 void (*con_deinit)(struct vc_data *); 36 void (*con_clear)(struct vc_data *, int, int, int, int); 37 void (*con_putc)(struct vc_data *, int, int, int); 38 void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int); 39 void (*con_cursor)(struct vc_data *, int); 40 int (*con_scroll)(struct vc_data *, int, int, int, int); 41 void (*con_bmove)(struct vc_data *, int, int, int, int, int, int); 42 int (*con_switch)(struct vc_data *); 43 int (*con_blank)(struct vc_data *, int, int); 44 int (*con_font_set)(struct vc_data *, struct console_font *, unsigned); 45 int (*con_font_get)(struct vc_data *, struct console_font *); 46 int (*con_font_default)(struct vc_data *, struct console_font *, char *); 47 int (*con_font_copy)(struct vc_data *, int); 48 int (*con_resize)(struct vc_data *, unsigned int, unsigned int, 49 unsigned int); 50 int (*con_set_palette)(struct vc_data *, unsigned char *); 51 int (*con_scrolldelta)(struct vc_data *, int); 52 int (*con_set_origin)(struct vc_data *); 53 void (*con_save_screen)(struct vc_data *); 54 u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8, u8); 55 void (*con_invert_region)(struct vc_data *, u16 *, int); 56 u16 *(*con_screen_pos)(struct vc_data *, int); 57 unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *); 58 /* 59 * Prepare the console for the debugger. This includes, but is not 60 * limited to, unblanking the console, loading an appropriate 61 * palette, and allowing debugger generated output. 62 */ 63 int (*con_debug_enter)(struct vc_data *); 64 /* 65 * Restore the console to its pre-debug state as closely as possible. 66 */ 67 int (*con_debug_leave)(struct vc_data *); 68}; 69 70extern const struct consw *conswitchp; 71 72extern const struct consw dummy_con; /* dummy console buffer */ 73extern const struct consw vga_con; /* VGA text console */ 74extern const struct consw newport_con; /* SGI Newport console */ 75extern const struct consw prom_con; /* SPARC PROM console */ 76 77int con_is_bound(const struct consw *csw); 78int register_con_driver(const struct consw *csw, int first, int last); 79int unregister_con_driver(const struct consw *csw); 80int take_over_console(const struct consw *sw, int first, int last, int deflt); 81void give_up_console(const struct consw *sw); 82#ifdef CONFIG_HW_CONSOLE 83int con_debug_enter(struct vc_data *vc); 84int con_debug_leave(void); 85#else 86#define con_debug_enter(vc) (0) 87#define con_debug_leave() (0) 88#endif 89 90/* scroll */ 91#define SM_UP (1) 92#define SM_DOWN (2) 93 94/* cursor */ 95#define CM_DRAW (1) 96#define CM_ERASE (2) 97#define CM_MOVE (3) 98 99/* 100 * The interface for a console, or any other device that wants to capture 101 * console messages (printer driver?) 102 * 103 * If a console driver is marked CON_BOOT then it will be auto-unregistered 104 * when the first real console is registered. This is for early-printk drivers. 105 */ 106 107#define CON_PRINTBUFFER (1) 108#define CON_CONSDEV (2) /* Last on the command line */ 109#define CON_ENABLED (4) 110#define CON_BOOT (8) 111#define CON_ANYTIME (16) /* Safe to call when cpu is offline */ 112#define CON_BRL (32) /* Used for a braille device */ 113 114struct console { 115 char name[16]; 116 void (*write)(struct console *, const char *, unsigned); 117 int (*read)(struct console *, char *, unsigned); 118 struct tty_driver *(*device)(struct console *, int *); 119 void (*unblank)(void); 120 int (*setup)(struct console *, char *); 121 int (*early_setup)(void); 122 short flags; 123 short index; 124 int cflag; 125 void *data; 126 struct console *next; 127}; 128 129extern int console_set_on_cmdline; 130 131extern int add_preferred_console(char *name, int idx, char *options); 132extern int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options); 133extern void register_console(struct console *); 134extern int unregister_console(struct console *); 135extern struct console *console_drivers; 136extern void acquire_console_sem(void); 137extern int try_acquire_console_sem(void); 138extern void release_console_sem(void); 139extern void console_conditional_schedule(void); 140extern void console_unblank(void); 141extern struct tty_driver *console_device(int *); 142extern void console_stop(struct console *); 143extern void console_start(struct console *); 144extern int is_console_locked(void); 145extern int braille_register_console(struct console *, int index, 146 char *console_options, char *braille_options); 147extern int braille_unregister_console(struct console *); 148 149extern int console_suspend_enabled; 150 151/* Suspend and resume console messages over PM events */ 152extern void suspend_console(void); 153extern void resume_console(void); 154 155int mda_console_init(void); 156void prom_con_init(void); 157 158void vcs_make_sysfs(int index); 159void vcs_remove_sysfs(int index); 160 161/* Some debug stub to catch some of the obvious races in the VT code */ 162#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress) 163 164/* VESA Blanking Levels */ 165#define VESA_NO_BLANKING 0 166#define VESA_VSYNC_SUSPEND 1 167#define VESA_HSYNC_SUSPEND 2 168#define VESA_POWERDOWN 3 169 170#ifdef CONFIG_VGA_CONSOLE 171extern bool vgacon_text_force(void); 172#endif 173 174#endif /* _LINUX_CONSOLE_H */ 175